3 files changed, 44 insertions, 4 deletions

diff --git a/xtask/src/lib.rs b/xtask/src/lib.rs
index 747654c1f..94d451e23 100644
--- a/xtask/src/lib.rs
+++ b/xtask/src/lib.rs
@@ -20,7 +20,7 @@ use walkdir::{DirEntry, WalkDir};
 
 use crate::{
     codegen::Mode,
-    not_bash::{fs2, pushd, pushenv, rm_rf, run},
+    not_bash::{fs2, pushd, pushenv, rm_rf},
 };
 
 pub use anyhow::{bail, Context as _, Result};
diff --git a/xtask/src/not_bash.rs b/xtask/src/not_bash.rs
index 8844fa216..0f3a56b25 100644
--- a/xtask/src/not_bash.rs
+++ b/xtask/src/not_bash.rs
@@ -54,7 +54,8 @@ pub mod fs2 {
     }
 }
 
-macro_rules! _run {
+#[macro_export]
+macro_rules! run {
     ($($expr:expr),*) => {
         run!($($expr),*; echo = true)
     };
@@ -65,7 +66,7 @@ macro_rules! _run {
         $crate::not_bash::run_process(format!($($expr),*), false, Some($stdin))
     };
 }
-pub(crate) use _run as run;
+pub use crate::run;
 
 pub struct Pushd {
     _p: (),
diff --git a/xtask/tests/tidy.rs b/xtask/tests/tidy.rs
index fcfad609d..72088e414 100644
--- a/xtask/tests/tidy.rs
+++ b/xtask/tests/tidy.rs
@@ -5,7 +5,7 @@ use std::{
 
 use xtask::{
     codegen::{self, Mode},
-    not_bash::fs2,
+    not_bash::{fs2, run},
     project_root, run_rustfmt, rust_files,
 };
 
@@ -49,6 +49,45 @@ fn rust_files_are_tidy() {
     tidy_docs.finish();
 }
 
+#[test]
+fn check_licenses() {
+    let expected = "
+0BSD OR MIT OR Apache-2.0
+Apache-2.0
+Apache-2.0 / MIT
+Apache-2.0 OR BSL-1.0
+Apache-2.0 OR MIT
+Apache-2.0 WITH LLVM-exception OR Apache-2.0 OR MIT
+Apache-2.0/MIT
+BSD-2-Clause
+BSD-3-Clause
+CC0-1.0
+ISC
+MIT
+MIT / Apache-2.0
+MIT OR Apache-2.0
+MIT/Apache-2.0
+MIT/Apache-2.0 AND BSD-2-Clause
+Unlicense OR MIT
+Unlicense/MIT
+Zlib
+"
+    .lines()
+    .filter(|it| !it.is_empty())
+    .collect::<Vec<_>>();
+
+    let meta = run!("cargo metadata --format-version 1"; echo = false).unwrap();
+    let mut licenses = meta
+        .split(|c| c == ',' || c == '{' || c == '}')
+        .filter(|it| it.contains(r#""license""#))
+        .map(|it| it.trim())
+        .map(|it| it[r#""license":"#.len()..].trim_matches('"'))
+        .collect::<Vec<_>>();
+    licenses.sort();
+    licenses.dedup();
+    assert_eq!(licenses, expected);
+}
+
 fn check_todo(path: &Path, text: &str) {
     let need_todo = &[
         // This file itself obviously needs to use todo (<- like this!).